package com.atguigu.day05;

import java.util.Scanner;

public class Test11 {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        String str = s.next();
        char ch = 'a';
        char[] chArr = str.toCharArray();
        for (int i = 0; i < chArr.length; i++) {
            if (chArr[i] == ch) {
                System.out.println("存在");
            }
        }
    }
}
